[UNIX]Прямой аналог QSettings на чистом Си

#ifndef _ZEXAM_CORE_CFG_H_
#define _ZEXAM_CORE_CFG_H_

#include <libconfig.h>
#include "zlog.h"

int cfg_load_scalar(void *outval, int type, 
		    const struct config_setting_t *parent_s,
		    const char *child_s_name,
		    struct zlog *log);

int cfg_save_scalar(const void *inval, int type,
		    struct config_setting_t *parent_s,
		    const char *child_s_name,
		    struct zlog *log);

int cfg_load_vec(void **outval, size_t *outcount, int type, 
		 const struct config_setting_t *parent_s,
		 const char *child_s_name,
		 struct zlog *log);

int cfg_save_vec(const void *inval, size_t count, int type,
		 struct config_setting_t *parent_s,
		 const char *child_s_name,
		 struct zlog *log);

typedef void (* cfg_initfn)(void *);
typedef void (* cfg_destroyfn)(void *);
typedef int (* cfg_loadfn)(void *, const void *, int, void *);
typedef int (* cfg_savefn)(const void *, void *, int ,void *);

int cfg_load_list(void **outval, size_t *count, size_t structsize, 
		  cfg_initfn initfn, cfg_destroyfn destroyfn,
		  cfg_loadfn loadfn, int load_mode,
		  const struct config_setting_t *parent_s,
		  const char *child_s_name,
		  struct zlog *log);

int cfg_save_list(void *children, size_t count, size_t structsize,
		  cfg_savefn savefn, int save_mode,
		  struct config_setting_t *parent_s,
		  const char *child_s_name,
		  struct zlog *log);

int cfg_load_obj_from_file(void *obj, cfg_loadfn loadfn,
			   int mode, const char *fpath, struct zlog *log);

int cfg_save_obj_to_file(void *obj, cfg_savefn savefn,
			 int mode, const char *fpath, struct zlog *log);

#endif

int zquestion_save(const struct zquestion *q, struct config_setting_t *s,
		   int mode, struct zlog *log)
{
	int status;

	status = cfg_save_scalar(&q->index, CONFIG_TYPE_INT, s, CFG_INDEX, log);
	if (status != 0) return -1;

	status = cfg_save_scalar(&q->text, CONFIG_TYPE_STRING, s, CFG_TEXT, log);
	if (status != 0) return -1;

	status = cfg_save_list(q->answers, q->nb_answers, sizeof(struct zanswer),
			       zanswer_save, mode, s, CFG_ANSWERS, log);
	if (status != 0) return -1;

	if (mode == MODE_SERVER) {
		status = cfg_save_scalar(&q->price, CONFIG_TYPE_FLOAT, s, 
					 CFG_PRICE, log);
		if (status != 0) return -1;

		status = cfg_save_scalar(&q->check_mode, CONFIG_TYPE_INT, s, 
					 CFG_CHECK_MODE, log);
		if (status != 0) return -1;		
	}

	return 0;
}